Abrasive wear maps for High Velocity Oxy Fuel (HVOF) sprayed WC-12Co and Cr3C2−25NiCr coatings

The friction and abrasive wear behavior of WC-12Co and Cr3C2–25NiCr HVOF sprayed coatings were investigated. The coefficient of friction and abrasive wear rate decreased with increasing sliding velocity, although the magnitude of decrease was different. The operating condition, mechanisms of wear, m...

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Bibliographic Details
Published in:Tribology international 2017-10, Vol.114, p.290-305
Main Authors: Vashishtha, Nitesh, Sapate, S.G.
Format: Article
Language:English
Subjects:
Abrasion
Abrasive wear
Abrasives
Coefficient of friction
Deformation mechanisms
Ductile-brittle transition
Failure modes
Flame spraying
Fracture mechanics
Friction
High velocity oxyfuel spraying
HVOF coating
Microstructure
Oxidation
Plastic deformation
Severity of contact
Sprayed coatings
Tungsten carbide
Wear maps
Wear mechanisms
Wear rate
Wear resistance
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Summary:The friction and abrasive wear behavior of WC-12Co and Cr3C2–25NiCr HVOF sprayed coatings were investigated. The coefficient of friction and abrasive wear rate decreased with increasing sliding velocity, although the magnitude of decrease was different. The operating condition, mechanisms of wear, microstructure and the extent of oxidation influenced friction and wear behavior of the coatings. The wear maps were used to identify transition in abrasive wear rates and severity of oxidative wear. The different wear regimes exhibited by the coatings were attributed to change in relative contribution of mechanical wear and oxidative wear with respect to operating variables. Severity of contact can be used to identify transitions in failure modes from plastic deformation to brittle fracture. •Effect of sliding velocity and load on abrasive wear behaviour HVOF sprayed WC-12Co, and Cr3C2-25NiCr coatings.•The relative contribution of mechanical wear and oxidative wear influenced wear and friction behavior of coatings.•Wear maps could identify transition in abrasive wear rates and wear mechanisms.•The different transitions in wear maps were attributed to mechanical wear or oxidative wear or combination of the both.•Severity of contact was useful indicator of transitions in failure modes from plastic deformation to brittle fracture.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2017.04.037